Star Deluxe Gas Stove, model ST-9660. This portable gas stove, manufactured since 1999, features auto-ignition and is designed for "smart living," emphasizing "noble, smart, [and] fashion" in its design. Gas stoves use an open flame to cook food and offer adjustable heat levels. The burners are often made of brass for durability and even heat distribution. Some studies suggest gas stoves may leak unburned natural gas containing benzene, a carcinogen, and produce fine particulates that can cause respiratory issues. The Bharat Hi-Star stove is cited as having high thermal efficiency.